While English is the native language of this wiki, we encourage developers to form communities around their own languages and to translate content to help those developers who aren’t so proficient with English.
We’ve recently been working to improve the support for non-English languages on the wiki. This month we’ve fixed printing of non-English characters in PDF – so now if you select "Download as PDF" in the wiki sidebar the resulting PDF will correctly display all charactes. Check it out for this Chinese topic: 使Windows Phone应用程序根据主题改变配色方案 - of course it works for Russian, Portuguese and Japanese too!
Using a script I’ve now added these translation links for most translations in Portuguese, Russian and Japanese. This makes it easy to see what has been translated, to find translations, and to jump to the original article to see if it has changed since translation. I’m still working on adding the links for Chinese topics – there are a lot of them, and in many cases there was no way to automatically "guess" what the original topic was using a script.
If you’re interested in translating articles or want to discuss further, add a response!